Pipe working tool



\ 'Aug. 14, 1934. R. B. PEALER El AL PIPE WORKING TOOL Filed Jan. 22. 1932 6 Sheets-Sheet 1 g R. B. PEALER ET AL 1,969,854

PIPE WORKING- TOOL Filed Jan. 22, 1932 e sheets-Sheet 2 gwventom 1934- R. B. PEALER ET AL 1,969,854

PIPE WORKING TOOL Filed Jan. 22. 1952 6 Sheets-Sheet 3 Aug. 14, 1934- R. B. PEALER ET AL 1,959,854

PIPE WORKING TOOL Filed Jan. 22,- 1952 s S heets-Shee t 4 Aug. 14, 1934.

R. B. PEALER ET AL 1,969,854

PIPE WORKING TOOL Filed Jan. 22, 1952 6 Sheets-Sheet 5 Patented Aug. 14, 1934 1,969,854 PIPE WORKING Tom. Robert B. Pealer, Parkman, and

Shafer, Warren,

Clarence Ohio, assignors to The Borden" Company, Warren, Ohio, a] corporation of Ohio Application January 22, 1932, Seria lNo. "588,124"

'4Claims. (ciio lzosy This invention relates to a mechanism adapted. to be clamped on a'stationary pipe to transmit power from. a suitable extraneous source to a. member adapted to perform work. To this end,:

5 we provide a power head adapted to be clamped. to the pipe and containing, in'a.very simple form, eife'ctive reduction gearing which may be coupled with a suitable extraneous source of. power and which will delivera comparatively lt slow rotation to a pipe threader, orcutter, or. other tool connected with the head. The power. may come from an electric or pneumaticdrill, or other readily available device havinga power driven shaft. Y. 9'

f The rotatable power-driven member or our,

invention has posts parallelwith'the pipe axis which the pipe-working member may slidablyengage. This, in case the pipe-working member is a threader, enables it to gradually approach the-clamped frame during the threading opera-.

tion. If'the pipe-working member is simply a cutter, this slidable provision is still useful in enabling an accurate setting of the cutter after the frame has been clamped in place.

In case a threading operation is to be per formed, the driven threading frame may carry a solid die block,-r a pair of coacting threading blocks held'in'adjusted position,or it may have severalradial chasers suitablyheldQ-In the latter case, these chasers may be either in' fixed position for a single' size pipe',;; or=-may be adjustable by the usual scroll arrangement for different sizes of pipe. If desired, the chaser-carrying' frame may beconnected with the power head by asuitable lead screw; and, if desired, the posts connecting the power head with the chaser frame may have inclinedguides operating to cause a gradual recession of the chasers as the threading progresses' after the manner of a receding die stock. V

If our inventionis embodied in a 'die' stock of the type having a work holder connected by a lead screw with a rotatable chaser frame, then the driving member of our reduction gearing is i carried by the work holder, which, in this case,

is the member clamped to the pipe} and the] driven member of such reduction gearing is connected to the annular chaser-carrying frame; in such manner that the chaser frame must r0? 0 tatewith such driven member, but can'movelengthwise of the pipe with reference thereto as the threads are'cut.

In carrying out the invention'in its preferred form, we mount a rotatable worm, transversely of the pipe axis, in'anextension of an annular frame clamped on the "pipe- Thisworni meshes with a'worm wheel rigid with a member which rotates on the annularflframe and has longitu dinal posts slidably carrying the cutter or chaser frame. Furthermore, we. arrange to have both ends of the worm shaft project to the err-- terior of the bearings and-be there formed angularly so that either end maybe readily engaged" by therotating' powe'r device. It followsfrom this double-endedconstruction, which "is also a feature of" our invention, that the same power device,*rotating in'- a constant 1 direction, if ap- Dliedto one end of the worm shaftwill rotate a chaser head, for example, in the direction tothe cut threads, while if applied to the other end, the chaser headwill be rotated in the opposite direction, so that the chasersmay back off from the thread .c'ut. In such backing movement, the resistance'or load being removed-or greatly reducedfthe speed of themotor may automati- 'cally increase; so that the time required in withdrawing the die l head is comparable to that present-in the usual in hand operation of spinnin'g'ofthe die'stock backwardly..

- In the" drawings, "we have illustrated I on power device-"as embodied in a receding 5 die stock; also as operating different forms of stationary'dies; alsoas operating an adapter which may receive and hold various pipe cutting dies; andfa'lso' "a pipeQcutter of the self-feeding In these drawings, Figs. '1 to 8, inclusive, illustrate the invention embodied in a settable rec'edi'rig' diest'ock; Figs 9" to 11 show the power head associated with; other forms of threading devices; Figs. 12 and113 as operating a pipe cuttenf The different views of the drawings are Fig. '1 'is an end elevation of our die stock in use, illustrating the power applied thereto by an electric,drill"; V v f Q Fig.12 is' a similar elevation, on a larger scale partlyibroken awayof thedie stock itself.

1: Fig. 3 is a side elevationof .the diestock.v

Fig. 4 is a. id etail of the-recession controlling post; of the die stock, beinga section on the line 44 of Figs. 3 and ;5. V

. Fig. 5. is an axialsection through the die stock in adiametric.plzineatright angles tothe driving worm.;

z-Fig..6 .isja detailofacam clamp which may be employedythe, position. being indicated by thef-line,6-..6.on Fig:. 5.-

1--,Fig;a7'?is, aitransversesection through the axis of the worm, as indicated by the line 7-7 on Fig. 5. V Fig. 8 is a view of a work holder clamp which may be employed, being an inner end elevation of the work holder.

Fig. 9 is an'end elevation of an embodiment wherein. our power device operates-an adapter carrying adie head. i e f Fig. 10 is a separated side elevation of the same, showing the adapter in position to be placed on the driving posts, part of the adapter and die head being shown in'section.

Fig. 11 is a perspective of a different form of 'die carrier adapted to be mountedon, and driven by, our power mechanism. I v I Fig. 12 is an end view of our'. power mechanism embodied with a self-feeding pipe cutter driven thereby- Fig. 13 is a side elevation, partly seetionah oi;

the embodiment shown in Fig. 12.

We will describe first the, receding die stock.

embodiment illustrated inFigs. l to 6, inclusive. In. such embodiment, thestationary frame of the power device corresponds in some ways-[to the work holder of a die-stock in that it is adapted to be clamped to the pipe and carry the driving mechanism, and also alead screw with which the driven device engages. As shown,;

v, studs 48 secured to the cam' plate -arms'.-- The. edge or one-ofthe blocks ficoacts with any .of

this work holder frame comprises a tubular member having nearits -outer and suitable means for .clamping it to the pipe,.and having adjacent its other end an internahthread. l1 cooperating with an external thread ona sleeve of the chaser carrying frame, as hereinafter:

explained. Any suitable -means-may be employed, to. clamp the work holder. on the pipe;

We have illustrateda pair of blocks or jaws. 13, 120 apart, and settable to various positions by a rotatable annular cam plate 14- which has scroll ribs 15 coacting with the blocks. {To complete the clamping, we provide a screwl'l, 120-;- from eachof the blocks 13,.threaded in the workholder and operated by an external handle 18.-

In this embodiment, the chaser-carrying head;

comprises a disc-like member hav-ing; secured to its inner side an externally threaded sleeve 2 meshing. with the -threads ll oi th work lr holder and having. on its outer side means for.

guiding the radial charters-30.; As shown, thedisc 20 carries an inner annular wall 23. an d an outer wall 24, which have aligned radial notches for receiving thechasers. The chasers are shown as bars rectangular in crosssection, havv ing cutting teeth on their inner ends and having pins 31 projecting from their outer faces. These pins occupy scroll grooves 41 in a cam plate-:40. This cam plate has a pair of diametrically ex: tending arms 42 by which the plate may be shifted to set .the chasers in any position desired for different sizes ofpipe. Surmounting the cam plate isan indicating plate 150, hav

7 ing suitable markings to designate. difleren't sizes of pipe, and shown as held in place byian'jL- shaped ring which'is secured byscrews jtl' to the chaser head and overlapsthe indicating plate. The, cam plate may be clamped to the indicating plate by suitable clamps 45 t'o' lock the cam plate in set position.-

As shown, the clamps 45 comprise blocks resting on the arms 42 and loosely pinned to them,

at 143, and overlapping the indicating plate,-and caused tobe clamped'againstsuchplate by'the turning down of wing nuts 47 thieadedz-onto' a plate during the threading operation.- This may be readily effected by inclined guides on the posts of the driving mechanism, which we will I now describe.

Rotatably mounted on the stationary frame workholder is a driven ring 70, which carries. a pair of diametrically opposed posts '71, whichextendthrough openings 2'? in the chaser gimme, whichfirame thus entirely surrounds the posts, so that they have a good driving connection therewith; "though the frame is longitudinally ;,n vab1 s an the posts.

The ring and posts furnish the intermediate members for driving the chaser frame. The means .ior' drivingjthe ring'will be presently described: It may be stated atthis point, however, that, in thecase oi areceding die stock, bysimply making an inclined groove '72 in one of the'posts; occupied by a projecting lug 52 on the indicating plate,-we' can eflect recession of the diesas thethreading progresses;

"Wewilldescribe now, the means for driving the ringzand posts, referring particularly to Figs.- 5 and '7. We have secured directly to the hub of the ring "70 a driving worm wheel 80, shown as bolted to such hub by bolts 81.- The worm wheel extends beyond the periphery of,

the hub 75,-3.and in the annular recess thus provide-liesanenlarged flange 91 of an enclosing; .house90 ,which extends about the worm wheel and beyond it is secured directly to the stationary irame as by means of screw bolts 93 passing througha flange 94 iormed'en; the frame] vThis arrangement serves to house the wormzvgwheeland atthesame time holds the worm wheel and the post ring against longitudinal movement, on the irame whilejallowing them tonfreely rotate. V y

M esh ,ng with the worm, wheel is a driving worm, 100;- which; is; formed one. double-ended shait 101 journalled inbearingsinan extension of; the worm wheel housing 90. We have shown two circular. end members 102 and 103 which are mounted inthehousingextension (which here has a; cylindrical form transverse of the diestock axis) and which carry the worm-shaft bear- 7 ings. v;,We have, shown roller bearings comprising outer .racemembers105 secured to the housing,

inner race members; 106 secured to the worm sh a ft,,and v intermediate bevel rollers 107. -Be.

yond the worm, at either end, the shaft 101 ex: tendsthrough. the bearing and then through a stufling'box consistingotpacking 110 and a suitable gland nut lll; and beyond such stuifing bOx the shait is iormed with an angular end portion 112 adapted to be. embraced by. a suitable socket on-the power-driving device. v

-It=.-will be seen that thehousing worm gearing, -'th the end members 102 and 103 and the stuffing boxescarried thereby,

make a-cornpleteenclosure rorv the worm drive;

hence thelzspace about the worm and ,worm wheel; may be packed with grease, which will be retained-therein indefinitely; I

In Fig. 7 we have indicated git-120 a suitable tubular guard extending-ever the idleend 112 oirthe shaft,- -thi sguard having an inward rib 1-13to obtain a-irictional. engagementina re- 90 for the iii cess 114 in housing hub 115 outside of the stuff-.

ing box. The engagement, however,'is merely frictional and a suitable manual forceapplied to the guard will readily remove it.

In Figs. 9 and 10, We have shown our'power head clamped on a pipe 3 mounted in a. suitablein this case there is no lead screw connection between the chaser frame and the stationary frame. The adapter has an axial opening 134 adapted to receive any suitable die head held in place by a radial set screw 135 adapted to occupy a recess in the inserted member. Such inserted member might, for instance, comprise dies or chasers mounted in a sleeve or bushing fitting directly into the opening 134 and having a recess in its barrel to receive the screw 135. An illustration of such a die head is found inapplication Serial No. 503,895 of Win. A. Phillis, assigned to The Borden Company. I

In Figs. 9 and 10, we have shown the adapter opening 134 as of considerably greater diameter than that of the barrel of the particular die head 150 shown,'and the space is taken up by a bushing 140. ing a flange 141 resting against theouter face of the adapter, and its body as having a radial opening through which the screw 135 passe into engagement with the barrel of an inserteddie head 150.

On its inner periphery, the bushing is provided with a longitudinal groove 146 adapted to be occupied by a key 151 formed on the exterior or" the barrel 150. This barrel is shown as having an enlarged head portion 152 in which are radial notches occupied by chasers 153. The chasers are clamped in place by a ring 155, L- shaped in cross section, held on the head by screws 156. described and claimed in Patent No. 1,803,484, granted to our assignee, The Borden Company.

By using such an adapter as shown in Figs. 9 and 10, with a fairly-large central opening, the same adapter may carry. a variety of die heads by the use of suitable bushings.

In Fig. 11 we have indicated, at 160, a die carrier in the form of a plate having bosses with openings 161 to receive the posts 71, and having sockets 162 to receive the pressure handies. This plate is shown as having a pair of ribs 163 carrying between them adjustable die blocks 165 positioned by set screws 166 and locked by screws 167. When such a die headis piaced on the posts '71, and pressed by the handles onto the pipe, our power mechanism furnishes means for rotating it, asalready described.

In the construction illustrated by Figs. 9 to 11, it will be seen that the driving posts '71 not only drive the chaser-carrier, but actually support it, maintaining it in true axial relation to the pipe; and there is no tendency for the weight of the head to cause the device to sag as it is going onto the pipe. The die carrier is advanced after the threading starts by the thread itself; and the carrier slides along the posts during such operation. Thus the perfect thread may be out.

In Figs. 12 and 13 we have shown our power This bushing is shown as hav- Such form of die head is shown,

Borden Company. In this case, the posts 71 slidably engage openings in a frame 170 which has a transverse guideway 171 in which are mountedsapair of blocks 1'72 carrying cutter knives. These blocks have ears 173 which engage the right-and-left-hand screw 174 inter-= mediately mounted in a forked boss 175 carried by the framellO. Accordingly, the blocks may be positioned as desired by the right-and-lefthand screw to bring the cutter against the-pipe shown at B. Y a a The cutters 180 are shown as mounted on blocks slidably guided in the blocks 172, these sliding blocks being pressed by springs 181 toward the pipe. With this construction, when the cutting head is in proper position, the rightand-left-hand screw is turned to not only bring the cutter knives into engagement with the pipe but to press them back into the-housings,

compressing the springs 181; and then, as the cutting progresses by the power rotation of the head 170, the springs feed the cutters into the pipe.

In this operation of a cutter, while the cutter does not move longitudinally of the pipe during the threadingoperation, the provision for longitudinal movement is nevertheless of advantage as it enables the power frame to "be clamped roughly in position. on the pipe and the" cutter thereafter set accurately with the cutterknives in the. exact region severed. y

In the operation of any of the forms'of our device, the pipe is clamped in a vise and the frame applied .to such stationary pipe inthe:

usual manner of a die stock work holder; but instead of the tool head being rotated by manpower, one simply applies the socket of an electric or pneumatic drill, as indicated at A in Fig. 1, to one of the projecting ends 112 of the worm shaft.

Assuming that rotation of the drill shaft is right-handed, its application for instance to that end of the worm shown at the right-hand in Fig. 7, will rotate the worm in a direction to give a right-hand rotation to the Worm wheel to carry around the chasers of a die head, for instance, in the cutting direction. Now to remove the die stock without changing the direction of the rotation of the drill, one simply applies it to the other end-of the worm shaft 112, the guard being shifted to the other end. When applied to the left-hand end of the shaft in Fig. '7, the right-hand rotation of the drill turns the worm in the direction to give a lefthand rotation to the worm wheel; thus causing the chasers'to backofi from the pipe.

It will be seen, therefore, that we have provided a very simple form of reduction gearing readily available for giving a comparatively slow rotation to the driven tool from a comparatively rapidly operating driven shaft of an ordinary electric or pneumatic drill, or othersource of power. In the backing-01f operation of a thread cutter, since the chasers are relieved of their cutting load, little power is required, and hence the drill motor may operate at a much increased where the pipe is to be mechanism driving a self-feeding cutter of the general type of Patent No. 1,150,220 of The speed, so that the removal of the die head is cation of available power, it will be understood that, in case of an emergency, one might apply a suitable hand crank to the proper projecting end of theworm shaft and thus cause the operation manually. i

,Wezclaimz, r a p 1.;In a cutting tool, the combination of an annular frame, airing rotatably mounted thereon and having means for driving a tool, said ring having a hub of smaller diameter than the ring, a WOllll wheelsecured tosaid hub in spaced relation to said ring and extending radiallybe yond said hub to form a recess, a housing for the worm wheel secured to the frame and having. an annular portion occupying the recess between,

Worm Wheel having an annular portion occupy-- ing the recess between said ring and worm wheel, and a Worm rotatably mounted in the housing and engaging the worm wheel for driving the same.,: 7 x l i 3. Ina device of the character described, the combination of an annular frame provided with ameans for clamping it on a pipe, a rotatable ring carried by the frame, a, plurality of posts carried by the ring, a worm wheel rigid with the ring, a driving'worm journalled in the frame and meshing with. the worm wheel, anadapter having a plurality of openings embracing said may be mounted and having means for carrying handleswhereby the thepipe.

4.!In va-die stock, the combination of a work holder provided; with means whereby it may be clamped on a pipe, said work holder having an internally threaded sleeve portion surrounding the pipe and a laterally extending portion, a chaser-carrying frame having an externally threaded sleeve engaging the'internal thread on the sleeve of the work holder, a ring rotatably mounted onthe work -holder sleeve and so connected with-the chaser-carrying frame that they rotate together, said ring having a hub of smaller diameter than the ring on one side, a worm wheel secured to said hub in spaced relation to said ring and extending radially beyond, the same to form a recess, a housing for the worm wheel having a mouth portion occupying the recess about the ring hub and having a body portion extending over the worm wheel and secured to the lateral extension of the Work holder, said housing having a tubular portion tangentially of the worm wheel, a worm occupying said tubular portion of the housing and meshing with the worm wheel and having a shaft extending in each direction from its body, bearings for therespective shaft extensions, and end-members for the tubular portion of the housing surrounding the shaft extensions and carrying the bearingsand each provided with a stufiing box through and beyond which the shaft extends.

ROBERT B. PEALER.

CLARENCE W. SHAFER.

dies may be pressed onto 

